The principal aim of the current research is the design and optimization of a multigeneration unit capable of generating electricity and potable water and hydrogen. The
system comprises a gas turbine unit, a high-temperature solid-oxide fuel cell (SOFC), a
combustion chamber, and a multi-effect desalination (MED) system. The pressurized
steam and fuel enter the anode side of high-temperature SOFC and the air goes to the
cathode side. Due to reactions inside the SOFC, a high amount of electricity produces, and
excess H2 enters the combustion chamber. Hot flue gases can run a gas turbine and a MED
unit to generate more electrical power and desalinated water. The study illustrated the
impact of current density on voltage losses and output power and output voltage of SOFC.
A parametric examination is also conducted to demonstrate the influence of primary
design variables on the system performance. Exergo-economic multi-criteria optimization
is used to determine the optimized parameters to obtain the higher efficiency and lower
cost of fuel and equipment. Calculations represented that the suggested arrangement is
able to generate 53.46 kg/s desalinated water, and 54.8 MW electricity and 7.43 kg/h
hydrogen energy. The system exergy efficiency under this condition is about 36.45% but the
results of optimization showed that this value could rise up between 50.8% and 61.17% with
the lowest system cost